Mangrove Cell Secrets: Engineering Salt-Tolerant Crops for Climate Resilience
Photo by Timothy K
त्वरित संशोधन
Mangroves have evolved 30 times over the last 200 million years to adapt to saltwater.
Mangroves have small leaf epidermal pavement cells and thicker cell walls.
Some mangrove species filter out salt at the roots, while others secrete it through their leaves.
महत्वपूर्ण संख्याएं
दृश्य सामग्री
Mangrove Cell Traits for Salt-Tolerant Crops
This mind map illustrates how mangrove cell traits can be leveraged to engineer salt-tolerant crops, addressing salinity issues in agriculture and enhancing climate resilience.
Salt-Tolerant Crops
- ●Mangrove Cell Traits
- ●Engineering Strategies
- ●Benefits
- ●Challenges
परीक्षा के दृष्टिकोण
Environmental adaptation and resilience
Climate change impacts on agriculture
Biotechnology and crop improvement
Coastal ecosystem management
विस्तृत सारांश देखें
सारांश
A new study in *Current Biology* identifies cell traits in mangroves that enable them to tolerate saltwater, offering strategies to engineer salt-tolerant crops. Mangroves have evolved 30 times over 200 million years to adapt to saltwater. Researchers analyzed 34 mangrove species across 17 plant families, finding they have small leaf epidermal pavement cells and thicker cell walls, providing mechanical strength to tolerate low osmotic potentials.
Different mangrove groups use various mechanisms to exclude salt or secrete it out of their leaves. This study offers strategies to engineer salt-tolerant plants by manipulating cell size and cell wall properties, focusing on economically important plants threatened by increasing salinity.
पृष्ठभूमि
नवीनतम घटनाक्रम
बहुविकल्पीय प्रश्न (MCQ)
1. Consider the following statements regarding the adaptations of mangroves to saline environments: 1. Mangroves have evolved only once in evolutionary history, leading to a single lineage of salt-tolerant species. 2. Some mangrove species exclude salt at the root level, while others secrete salt through specialized glands in their leaves. 3. The study in *Current Biology* identified larger epidermal pavement cells as a key adaptation for salt tolerance. Which of the statements given above is/are correct?
- A.1 and 2 only
- B.2 only
- C.1 and 3 only
- D.1, 2 and 3
उत्तर देखें
सही उत्तर: B
Statement 1 is incorrect because mangroves have evolved independently multiple times. Statement 3 is incorrect because the study identified smaller epidermal pavement cells as a key adaptation.
2. In the context of the recent study on mangrove cell traits, which of the following strategies would be MOST effective in engineering salt-tolerant crops?
- A.Increasing the size of leaf epidermal pavement cells to enhance water storage capacity.
- B.Decreasing the thickness of cell walls to facilitate nutrient uptake.
- C.Enhancing the production of salt-secreting glands in leaves.
- D.Reducing the root's ability to exclude salt to promote osmotic balance.
उत्तर देखें
सही उत्तर: C
The study highlights that some mangroves secrete salt through specialized glands in their leaves. Enhancing this mechanism in crops would be a direct application of the study's findings.
3. Which of the following factors contributes MOST significantly to the increasing salinity of agricultural lands globally?
- A.Decreased rainfall and increased evapotranspiration
- B.Excessive use of nitrogenous fertilizers
- C.Over-extraction of groundwater for irrigation
- D.Deforestation in upland areas leading to soil erosion
उत्तर देखें
सही उत्तर: C
Over-extraction of groundwater for irrigation often leads to the mobilization of salts from deeper soil layers, resulting in increased salinity in the topsoil.
4. Assertion (A): Mangrove ecosystems play a crucial role in mitigating the impacts of climate change. Reason (R): Mangroves are highly efficient carbon sinks and provide coastal protection against storm surges and sea-level rise. In the context of the above statements, which of the following is correct?
- A.Both A and R are true, and R is the correct explanation of A.
- B.Both A and R are true, but R is NOT the correct explanation of A.
- C.A is true, but R is false.
- D.A is false, but R is true.
उत्तर देखें
सही उत्तर: A
Both the assertion and the reason are true, and the reason correctly explains why mangrove ecosystems are important for climate change mitigation.